Differential D22266 Diff 71987 src/activities/algebra_by/algebra.js

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src/activities/algebra_by/algebra.js

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22 22​
23var currentLevel 23​var currentLevel
24var coreItems 24​var coreItems
25var otherItems 25​var otherItems
26var operand 26​var operand
27var secondOperandVal 27​var secondOperandVal
28var firstOperandVal 28​var firstOperandVal
29var operations = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] 29​var operations = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
30​var OperandsEnum = {
31​ TIMES_SIGN : "\u00D7",
32​ PLUS_SIGN : "\u002B",
33​ MINUS_SIGN : "\u2212",
34​ DIVIDE_SIGN : "\u2215"
35​}
30 36​
31var nbLevel = operations.length 37​var nbLevel = operations.length
32 38​
33function start(coreItems_, otherItems_, operand_) { 39​function start(coreItems_, otherItems_, operand_) {
34 operand = operand_ 40​ operand = operand_
35 coreItems = coreItems_ 41​ coreItems = coreItems_
36 otherItems = otherItems_ 42​ otherItems = otherItems_
37 currentLevel = 0 43​ currentLevel = 0
38 coreItems.score.numberOfSubLevels = 10 44​ coreItems.score.numberOfSubLevels = 10
39 // for multiplication and addition, the first levels will display 45​ // for multiplication and addition, the first levels will display
40 // currentLevel * N (N behind random) 46​ // currentLevel * N (N behind random)
41 // where the last levels will do: 47​ // where the last levels will do:
42 // N * currentLevel 48​ // N * currentLevel
43 if(operand.text === "x" || operand.text === "+") 49​ if(operand.text === OperandsEnum.TIMES_SIGN || operand.text === OperandsEnum.PLUS_SIGN)
44 nbLevel = 2 * operations.length 50​ nbLevel = 2 * operations.length
45 else 51​ else
46 nbLevel = operations.length 52​ nbLevel = operations.length
47 initLevel() 53​ initLevel()
48} 54​}
49 55​
50function stop() { 56​function stop() {
51 coreItems.balloon.stopMoving() 57​ coreItems.balloon.stopMoving()
Show All 25 Lines80function previousLevel() {
77 } 83​ }
78 initLevel(); 84​ initLevel();
79} 85​}
80 86​
81function calculateOperands() 87​function calculateOperands()
82{ 88​{
83 switch(operand.text) 89​ switch(operand.text)
84 { 90​ {
85 case "x": 91​ case OperandsEnum.TIMES_SIGN:
86 firstOperandVal = coreItems.bar.level 92​ firstOperandVal = coreItems.bar.level
87 secondOperandVal = operations[coreItems.score.currentSubLevel - 1] 93​ secondOperandVal = operations[coreItems.score.currentSubLevel - 1]
88 break; 94​ break;
89 case "+": 95​ case OperandsEnum.PLUS_SIGN:
90 firstOperandVal = coreItems.bar.level 96​ firstOperandVal = coreItems.bar.level
91 secondOperandVal = operations[coreItems.score.currentSubLevel - 1] 97​ secondOperandVal = operations[coreItems.score.currentSubLevel - 1]
92 break; 98​ break;
93 case "-": 99​ case OperandsEnum.MINUS_SIGN:
94 firstOperandVal = coreItems.bar.level + 9 100​ firstOperandVal = coreItems.bar.level + 9
95 secondOperandVal = operations[coreItems.score.currentSubLevel - 1] 101​ secondOperandVal = operations[coreItems.score.currentSubLevel - 1]
96 break; 102​ break;
97 case "/": 103​ case OperandsEnum.DIVIDE_SIGN:
98 firstOperandVal = coreItems.bar.level * operations[coreItems.score.currentSubLevel - 1] 104​ firstOperandVal = coreItems.bar.level * operations[coreItems.score.currentSubLevel - 1]
99 secondOperandVal = coreItems.bar.level 105​ secondOperandVal = coreItems.bar.level
100 break; 106​ break;
101 } 107​ }
102 108​
103 if(currentLevel < operations.length) { 109​ if(currentLevel < operations.length) {
104 otherItems.firstOp.text = firstOperandVal 110​ otherItems.firstOp.text = firstOperandVal
105 otherItems.secondOp.text = secondOperandVal 111​ otherItems.secondOp.text = secondOperandVal
106 } else { 112​ } else {
107 otherItems.firstOp.text = secondOperandVal 113​ otherItems.firstOp.text = secondOperandVal
108 // Don't forget to remove the first operations.length levels 114​ // Don't forget to remove the first operations.length levels
109 firstOperandVal -= operations.length 115​ firstOperandVal -= operations.length
110 otherItems.secondOp.text = firstOperandVal 116​ otherItems.secondOp.text = firstOperandVal
111 } 117​ }
112} 118​}
113 119​
114// Return the expected answer 120​// Return the expected answer
115function getAnswer() { 121​function getAnswer() {
116 switch(operand.text) 122​ switch(operand.text)
117 { 123​ {
118 case "x": 124​ case OperandsEnum.TIMES_SIGN:
119 return (firstOperandVal * secondOperandVal) 125​ return (firstOperandVal * secondOperandVal)
120 126​
121 case "+": 127​ case OperandsEnum.PLUS_SIGN:
122 return (firstOperandVal + secondOperandVal) 128​ return (firstOperandVal + secondOperandVal)
123 129​
124 case "-": 130​ case OperandsEnum.MINUS_SIGN:
125 return (firstOperandVal - secondOperandVal) 131​ return (firstOperandVal - secondOperandVal)
126 132​
127 case "/": 133​ case OperandsEnum.DIVIDE_SIGN:
128 return (firstOperandVal / secondOperandVal) 134​ return (firstOperandVal / secondOperandVal)
129 } 135​ }
130} 136​}
131 137​
132function validateAnswer(screenAnswer) 138​function validateAnswer(screenAnswer)
133{ 139​{
134 return (getAnswer() === screenAnswer) 140​ return (getAnswer() === screenAnswer)
135} 141​}
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